// Programmer: Janet Joy
// Rich text editor
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace Notes1
{
    public partial class Form1 : Form
    {
        String currentFileName = "Untitled";
        Boolean changed = false;
        public Form1()
        {
            InitializeComponent();
        }
        private void Form1_Load(object sender, EventArgs e)
        {
            // At timer1 tick display date and time
            timer1.Enabled = true;
            // Position the rich text box to left, under the toolstrip.
            richTextBox1.Top = toolStrip1.Top + toolStrip1.Height;
            richTextBox1.Left = 0;
            resizeRichText();
        }

        private void timer1_Tick(object sender, EventArgs e)
        {
            toolStripStatusDateTime.Text = System.DateTime.Now.ToString();
        }

        private void Form1_Resize(object sender, EventArgs e)
        {
            // Select the form, in properties, click events, add resize:
            resizeRichText();
        }
        private void resizeRichText()
        {
            // Rich text box will fill the form between the toolstrip and the status bar.
            richTextBox1.Width = this.Width;
            richTextBox1.Height = statusStrip1.Top - richTextBox1.Top;
        }
        private void SaveFile()
        {
            // Make the save file name the same as open file.
            saveFileDialog1.FileName = openFileDialog1.FileName;
            if (currentFileName == "Untitled")
            {
                saveFileDialog1.Filter = "RichText|*.rtf";
                saveFileDialog1.ShowDialog();
                // If user selected cancel filename will be "".
                if (saveFileDialog1.FileName != "")
                {
                    currentFileName = saveFileDialog1.FileName;
                }
            }
            if (currentFileName != "Untitled")
            {
                // Save the file.
                richTextBox1.SaveFile(saveFileDialog1.FileName);
                // There have been no changes since the last save.
                changed = false;
                // Display the filename in the status bar.
                toolStripStatusFilename.Text = saveFileDialog1.FileName;
            }
        }

        private void saveToolStripButton_Click(object sender, EventArgs e)
        {
            // Save the file.
            SaveFile();
        }

        private void saveToolStripMenuItem_Click(object sender, EventArgs e)
        {
            // Save the file.
            SaveFile();
        }
        private Boolean AskToSave()
        {
            // If there is no change to list don't ask, don't save, and don't cancel
            DialogResult result = DialogResult.No;
            if (changed)
            {
                result = MessageBox.Show("Do you want to save changes to " + currentFileName + "?", "Closing", MessageBoxButtons.YesNoCancel);
                // If they answer yes, write the file
                if (result == DialogResult.Yes) SaveFile();
            }
            // Returns true if they selected cancel. 
            // Returns false if there has been no change.
            return (result == DialogResult.Cancel);
        }

        private void Form1_FormClosing(object sender, FormClosingEventArgs e)
        {
            // Ask if they want to save. it returns true if the user chose to cancel.
            // The FormClosingEventArgs e has a cancel property. Setting it to true cancels the close event.
            e.Cancel = AskToSave();
        }

        private void exitToolStripMenuItem_Click(object sender, EventArgs e)
        {
            // Ask if they want to save. it returns true if the user chose to cancel.
            Boolean cancel = AskToSave();
            if (!cancel) Close();
        }

        private void richTextBox1_TextChanged(object sender, EventArgs e)
        {
            // Set change to true if there are any changes to the rich text box.
            changed = true;
        }

        private void saveAsToolStripMenuItem_Click(object sender, EventArgs e)
        {
            // Set filter for saveFileDialog
            saveFileDialog1.Filter = "RichText|*.rtf";
            // Set open file as the default:
            saveFileDialog1.FileName = openFileDialog1.FileName;
            saveFileDialog1.ShowDialog();
            // Filename will be "" if user selects cancel.
            if (saveFileDialog1.FileName != "")
            {
                richTextBox1.SaveFile(saveFileDialog1.FileName);
                // There have been no changes since the last save.
                changed = false;
                // Display the filename in the status bar.
                toolStripStatusFilename.Text = saveFileDialog1.FileName;
            }
        }

        private void OpenFile()
        {
            // Remind to save.
            Boolean cancel = AskToSave();
            // If user did not select cancel, continue.
            if (!cancel)
            {
                // Set the filter. This could be done once in form load.
                openFileDialog1.Filter = "RichText|*.rtf";
                // Set default to current file
                openFileDialog1.FileName = currentFileName;
                openFileDialog1.ShowDialog();
                // If the user selects cancel filename will be "".
                if (openFileDialog1.FileName != "")
                {
                    // Load the new file
                    richTextBox1.LoadFile(openFileDialog1.FileName);
                    // There have been no changes since the last save.
                    changed = false;
                    // track current filename.
                    currentFileName = openFileDialog1.FileName;
                    // Display the filename in the status bar.
                    toolStripStatusFilename.Text = openFileDialog1.FileName;
                }
            }
        }

        private void openToolStripMenuItem_Click(object sender, EventArgs e)
        {
            // OpenFile is called from both the menu item and tool strip button.
            OpenFile();
        }

        private void openToolStripButton_Click(object sender, EventArgs e)
        {
            // OpenFile is called from both the menu item and tool strip button.
            OpenFile();
        }

        private void newToolStripButton_Click(object sender, EventArgs e)
        {
            // Delete everything from richtext box
            NewDocument();
        }

        private void newToolStripMenuItem_Click(object sender, EventArgs e)
        {
            // Delete everything from richtext box
            NewDocument();
        }
        private void NewDocument()
        {
            // Delete everything from richtext box
            // Remind to save.
            Boolean cancel = AskToSave();
            // If user did not select cancel, continue.
            if (!cancel)
            {
                // Delete the contents of the rich text box.
                richTextBox1.Text = "";
                // Set the filename to untitled.
                currentFileName = "Untitled";
                // No changes so far.
                changed = false;
                // Show untitled in status bar.
                toolStripStatusFilename.Text = currentFileName;
            }
        }

        private void toolStripFont_Click(object sender, EventArgs e)
        {
            // You can also add a font item to  the menu under tools.
            SelectFont();
         }

        private void SelectFont()
        {
            // Display the font dialog and change font of selected text.
            // If no text is selected this has no effect.
            Font selectionFont = richTextBox1.SelectionFont;
            fontDialog1.Font = richTextBox1.SelectionFont;
            fontDialog1.ShowDialog();
            richTextBox1.SelectionFont = fontDialog1.Font;
        }

        private void toolStripColor_Click(object sender, EventArgs e)
        {
            SelectColor();
        }
        private void SelectColor()
        {
            // Display the color dialog and change color of selected text.
            // If no text is selected this has no effect.
            Color selectionColor = richTextBox1.SelectionColor;
            colorDialog1.ShowDialog();
            richTextBox1.SelectionColor = colorDialog1.Color;
        }

        private void pasteToolStripButton_Click(object sender, EventArgs e)
        {
            // Using the button on toolbar.
            Paste();
        }

        private void pasteToolStripMenuItem_Click(object sender, EventArgs e)
        {
            // This is very important because the shortcut key for the menu item is Ctrl+V
            Paste();
        }

        private void Paste()
        {
            // Paste from Clipboard
            richTextBox1.SelectedText = Clipboard.GetText();
            changed = true;
        }

        private void Cut()
        {
            // Cut copys to clipboard and then deletes.
            Clipboard.SetText(richTextBox1.SelectedText);
            richTextBox1.SelectedText = "";
            changed = true;
        }

        private void Copy()
        {
            // Copys to clipboard, no change to richtext
            Clipboard.SetText(richTextBox1.SelectedText);
            richTextBox1.SelectedText = "";
        }

        private void cutToolStripMenuItem_Click(object sender, EventArgs e)
        {
            // This is very important because the shortcut key for the menu item is Ctrl+X
            Cut();
        }

        private void cutToolStripButton_Click(object sender, EventArgs e)
        {
            // Cut using tool bar button.
            Cut();
        }

        private void copyToolStripButton_Click(object sender, EventArgs e)
        {
            // Copy from tool bar button.
            Copy();
        }

        private void copyToolStripMenuItem_Click(object sender, EventArgs e)
        {
            // Copy from menu.
            Copy();
        }

        private void contextCut_Click(object sender, EventArgs e)
        {
            // Cut from context menu.
            Cut();
        }

        private void contextCopy_Click(object sender, EventArgs e)
        {
            // Copy from context menu.
            Copy();
        }

        private void contextPaste_Click(object sender, EventArgs e)
        {
            // Paste from context menu.
            Paste();
        }
    }
}